a relentless and persistent series of challenges, difficulties, or obstacles, typically experienced over a prolonged period of time
猛攻
the attribute of color that distinguishes one color from another based on its position in the color spectrum or wheel
色调
(physics) a unit of force in the centimeter-gram-second system of units, equal to the force that would give a mass of one gram an acceleration of one centimeter per second squared
达因
words, phrases, and expressions used by a specific group or profession, which are incomprehensible to others
行话
a system of beliefs, principles, or teachings that are formally taught, advocated, or followed
教义
an individual who acts as if they possess special qualities, knowledge, or skills
庸医
a thin oval board that a painter uses to mix colors and hold pigments on, with a hole for the thumb to go through
绘画调色板
a strong and unusual attachment or obsession with a particular object, idea, or activity
物神
the art or skill of managing and conducting the affairs of a state or government
治国之道
a diplomatic agent or official accredited to a foreign government or international organization, usually of lower rank than an ambassador
使者